How well do you know the SAW movies?

The Saw movies are both scary and disturbing.Only a few people really know Jigsaw and what he does. Do you?

1 What did the first person that Jigsaw killed do to deserve it?
2 What did the people in SAW V do wrong in the maze?
3 What happened to Jigsaw to make him attempt suicide?
4 How does Jigsaw pick his victims?
5 What is the most common item that jigsaw uses to identify himself